Parameter selection in a communication system

• US 20030182664A1
• Filed: 10/18/2002
• Published: 09/25/2003
• Est. Priority Date: 02/28/2002
• Status: Active Grant

• Current Assignee: Texas Instruments, Inc.
• Original Assignee: Texas Instruments, Inc.
• Inventors: Bitran, Yigal, Shalvi, Ofir, Sommer, Naftali, Reznic, Zvi, Lusky, Itay, Yagil, Ariel, Wajcer, Daniel, Haim, Eli, Bendel, Yosef, Senderovitz, Ran
• Granted Patent: US 7,197,067 B2
• Time in Patent Office: Days
• US Class Current: 725/111
• CPC Class Codes: H04L 1/0001 Systems modifying transmission characteristics according to link quality, e.g. power backoff adaptive data allocation for multicarrier modulation H04L5/0044; controlling transmission power for radio systems H04W52/04
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0017 where the mode-switching is based on Quality of Service requirement
• CPC Class Codes: H04L 1/0019 in which mode-switching is based on a statistical approach
• CPC Class Codes: H04L 1/20 using signal quality detector

Abstract

A method is provided for automatically optimizing parameter selection in a communication system having one or more channels for transmitting and receiving signals comprising the steps of: receiving a signal from a channel; characterizing impairments in the channel while gathering statistics using the received signal; analyzing the impairments to obtain recommendations for parameter modifications for improved performance; and modifying the parameters based on the recommendations. Other systems and methods are disclosed.

Claims

1. A method for automatically optimizing parameter selection in a communication system having one or more channels for transmitting and receiving signals comprising the steps of:

a. receiving a signal from a channel;

b. characterizing impairments in the channel while gathering statistics using the received signal;

c. analyzing the impairments to obtain recommendations for parameter modifications for improved performance; and

d. modifying the parameters based on the recommendations.

2. The method of claim 1 wherein transmission is occurring on the channel.

3. The method of claim 1 wherein transmission is not occurring on the channel.

4. A system for automatically optimizing parameter selection in a communication system having one or more channels for transmitting and receiving signals comprising:

a. one or more low level analysis modules coupled to the channels for characterizing impairments in the channels; and

b. one or more high level analysis modules having inputs coupled to the low level analysis modules and outputs coupled to the communication system for analyzing the impairments to determine recommendations for parameter modifications for improved performance.

5. The system of claim 4 wherein transmission is occurring on one or more of the channels.

6. The system of claim 4 wherein transmission is not occurring on one or more of the channels.

7. The system of claim 4 wherein the system is part of a cable modem termination system.

8. The system of claim 4 wherein the communication system comprises a receiver having a first digital front end for processing active transmissions and a second digital front end for processing signals to use for optimizing parameter selection.

9. A system for automatically optimizing parameter selection in a communication system, having a receiver, comprising:

a. a channel allocation and reallocation unit coupled to the receiver;

b. a channel monitoring unit coupled to the receiver;

c. an highly correlated noise analyzer coupled to the channel allocation and reallocation unit; and

d. a time domain analyzer coupled to the channel monitoring unit.

10. The system of claim 9 wherein the time domain analyzer further comprises:

a. an energy detection unit having an energy detection output coupled to the channel monitoring unit;

b. a soft decision unit having a soft decision output coupled to the channel monitoring unit; and

c. a Reed-Solomon (RS) feedback unit having a RS feedback output coupled to the channel monitoring unit.

11. The system of claim 10 further comprising a histogram generator unit having an output coupled to the channel monitoring unit and having an input coupled to the energy detection output, the soft decision output and the RS feedback output.

12. The system of claim 9 further comprising a spectrum manager coupled to the receiver.

13. The system of claim 12 wherein the spectrum manager comprises a spectrum analyzer.

14. The system of claim 9 wherein the receiver comprises a first digital front end for processing active transmissions and a second digital front end for processing signals to use for optimizing parameter selection.

15. The system of claim 9 wherein the system is part of a cable modem termination system.